A cooling system seal detection device

Abstract

The application relates to the technical field of aseptic packaging, in particular to a cooling system sealing detection device, which comprises a filling needle and a filling valve plate, the filling valve plate is communicated with the cooling channel of the filling needle, a cooling circulation pipeline is used for conveying a cooling medium into the cooling channel of the filling valve plate and the filling needle. The application provides a cooling system sealing detection device, the filling needle is arranged in the filling valve plate, the filling needle is cooled through the cooling circulation pipeline, then the filling needle is inputted with detection gas through the arranged air charging detection unit, whether the filling needle leaks is judged in time through the pressure change of the gas, compared with the existing leakage points of the filling needle observed by artificial observation, the sealing of the filling needle can be more effectively detected.

Description

Technical Field

[0001] This application relates to the field of aseptic packaging technology, and in particular to a cooling system sealing detection device. Background Technology

[0002] In the production of blow-fill-seal equipment, the filling needle needs to be inserted into the high-temperature extrusion die. To prevent the high temperature from damaging heat-sensitive drugs, existing technology uses a jacketed filling needle design, where the inner tube delivers the drug and the outer tube is used for cooling water circulation. However, this cooling design has a potential risk: if the cooling water channel leaks, cooling water will mix with the drug, seriously threatening medication safety.

[0003] Traditional methods lack integrity detection devices and cannot detect the integrity of the filling and cooling system. They require manual inspection for leaks, which can only detect large leaks. If a minor leak occurs in the filling and cooling system, it may not be detected in time, leading to leakage of cooling water and contamination of bottles and pharmaceuticals, thus affecting medication safety. Furthermore, if a leak is discovered during production, all produced products must be destroyed, resulting in significant economic losses.

[0004] Therefore, there is an urgent need for a device that can effectively detect the sealing of the cooling channel of the filling needle in order to eliminate the risk of leakage. Utility Model Content

[0005] The purpose of this application is to provide a cooling system sealing detection device that can avoid the problem of leakage from the filling needle that cannot be detected in a timely manner.

[0006] To achieve the above objectives, this application provides a cooling system sealing detection device, comprising:

[0007] Filling needles;

[0008] The filling valve plate is connected to the cooling channel of the filling needle;

[0009] Cooling circulation piping is used to deliver cooling medium into the cooling channels of the filling valve plate and filling needle;

[0010] The inflation detection unit is used to deliver detection gas into the cooling channel of the filling valve plate and filling needle, and to indicate the leakage status of the cooling channel by detecting changes in the gas pressure.

[0011] Preferably, the cooling circulation pipeline includes a cooling water tank, an inlet pipe, and an outlet pipe. The cooling water tank is connected to the filling valve plate through the inlet pipe and the filling valve plate through the outlet pipe to form a cooling water circulation loop.

[0012] Preferably, a water pump is also installed in the cooling circulation pipeline to drive the cooling water in the cooling water tank to circulate in the cooling circulation pipeline.

[0013] Preferably, the filling needle includes an inner tube and an outer tube, which are arranged in a jacketed manner. The inner tube is the drug liquid channel, and the outer tube is the cooling water channel.

[0014] Preferably, the inflation detection unit includes an inflation gas path, which is connected to the cooling water channel of the outer tube of the filling needle through an inflation valve. The inflation valve is used to control the flow of gas to and from the cooling water channel. The inflation gas path is connected to a gas source, which provides detection gas. The detection gas is a low water-soluble gas.

[0015] Preferably, a one-way valve is connected in series on the pressurization air line between the pressurization valve and the filling valve plate.

[0016] Preferably, the low water-soluble gas supplied by the pressurized gas path to the cooling water path is nitrogen, air, or an inert gas.

[0017] Preferably, the inlet pipe is connected to an inlet valve, the outlet pipe is connected to an outlet valve, and the inflation detection unit also includes a pressure detection switch, which is installed on the cooling circulation pipe between the inlet valve and the outlet valve.

[0018] Preferably, the seal detection device further includes an extrusion die, into which a filling needle is inserted.

[0019] Preferably, the cooling water tank is equipped with a cooling device to cool the cooling water.

[0020] Compared with the above-mentioned background technology, this application provides a cooling system sealing detection device. This solution places the filling needle inside the filling valve plate and cools the filling needle through a cooling circulation pipeline. Then, through a set gas filling detection unit, detection gas is introduced into the cooling channel of the filling needle. The pressure change of the gas is used to determine whether the filling needle has leaked in a timely manner. Compared with the existing method of manually observing the leak point of the filling needle, it can more effectively detect the sealing performance of the filling needle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a specific implementation of the cooling system sealing test in this application.

[0023] in:

[0024] 1-Filling valve plate, 2-Inlet pipe, 3-Outlet pipe, 4-Inlet valve, 5-Outlet valve, 6-Check valve, 7-Pressure valve, 8-Pressure air circuit, 9-Filling needle, 10-Cooling water tank, 11-Water pump, 12-Pressure detection switch. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0028] A cooling system sealing detection device includes a filling needle 9, a filling valve plate 1, and the filling valve plate 1 is connected to the cooling channel of the filling needle 9.

[0029] Specifically, the filling needle 9 includes an inner tube and an outer tube, which are arranged in a jacketed manner. The inner tube is the liquid medicine channel, and the outer tube is the cooling water channel.

[0030] In some embodiments, the jacket configuration is specifically as follows: the inner tube is fitted inside the outer tube, forming an annular channel between them, which is the jacket. The internal space of the inner tube serves as a channel for transporting the medicinal liquid, while the outer tube is fitted outside the inner tube, with a certain gap between them, which is the portion through which cooling water flows.

[0031] Cooling circulation piping is used to deliver cooling medium into the cooling channels of filling valve plate 1 and filling needle 9.

[0032] The cooling system sealing detection device of the present invention, by introducing an inflation detection unit, can achieve efficient and non-destructive sealing detection of the internal cooling channels of the filling valve plate 1 and the filling needle 9.

[0033] Compared to traditional manual observation, this device can detect minor leaks in a timely manner, preventing the continued use of medicines contaminated by cooling water during the cooling process.

[0034] In some embodiments, the cooling circulation pipeline includes a cooling water tank 10, an inlet pipe 2, and an outlet pipe 3. The cooling water tank 10 is connected to the filling valve plate 1 through the inlet pipe 2 and to the filling valve plate 1 through the outlet pipe 3 to form a cooling water circulation loop.

[0035] Specifically, the cooling water in the cooling water tank 10 enters the filling valve plate 1 through the inlet pipe 2. The cooling water entering the filling valve plate 1 absorbs the heat from the filling needle 9 through contact heat absorption. The cooling water that has absorbed the heat re-enters the cooling water tank 10 through the outlet pipe 3.

[0036] In other embodiments, a closed-loop cooling water circulation system consisting of a cooling water tank 10, an inlet pipe 2, and an outlet pipe 3 ensures that cooling water can continuously and stably flow through the cooling channels inside the filling valve plate 1 and the filling needle 9. This helps to promptly remove the high heat generated by the extrusion die and the newly formed container during the blow-fill-seal production process, preventing the high heat from affecting the quality of the liquid medicine inside the filling needle 9.

[0037] In other embodiments, the cooling water tank 10 is equipped with a cooling device for cooling the cooling water. The cooling device cools the cooling water that has absorbed heat, facilitating the circulation and cooling of the cooling water.

[0038] The inflation detection unit is used to deliver detection gas into the cooling channel of the filling valve plate 1 and the filling needle 9, and to indicate the leakage status of the cooling channel by detecting the pressure change of the gas.

[0039] In some embodiments, an inlet valve 4 is connected to the inlet pipe 2, and an outlet valve 5 is connected to the outlet pipe 3. The inflation detection unit also includes a pressure detection switch 12, which is installed on the cooling circulation pipeline between the inlet valve 4 and the outlet valve 5.

[0040] Specifically, the simultaneous closure of inlet valve 4 and outlet valve 5 isolates filling valve plate 1 and filling needle 9 from cooling water tank 10, thus forming a closed state in this section of pipeline. Then, low water-soluble gas is introduced into this section, and the starting pressure and ending pressure are recorded within a certain time. The pressure difference is recorded, and the value of the pressure difference is used to determine whether there is a leak in this closed section of pipeline.

[0041] In some embodiments, the inflation detection unit includes an inflation gas path 8, which is connected to the cooling water channel of the outer tube of the filling needle 9 via an inflation valve 7. The inflation valve 7 is used to control the flow of gas to and from the cooling water channel. The inflation gas path 8 is connected to a gas source, which provides detection gas. The detection gas is a low water-soluble gas.

[0042] A one-way valve 6 is connected in series on the pressurization air passage 8 between the pressurization valve 7 and the filling valve plate 1.

[0043] Specifically, the pressure charging valve 7 is configured to deliver gas to the upper and middle closed pipeline section. In order to prevent the high-pressure area in the closed section from flowing into the position of the pressure charging gas path 8 when the pressure charging valve is closed, a check valve 6 is provided, which is configured to prevent air pressure backflow that affects the final air pressure detection value.

[0044] In some embodiments, the low-water-solubility gas provided by the pressure charging gas path 8 to the cooling water channel is nitrogen, air or inert gas.

[0045] Specifically, the low-water-solubility gas is arranged to prevent excessive gas from dissolving in cooling water, thereby affecting the final air pressure detection.

[0046] The sealing detection device further comprises an extrusion die head, and the filling needle 9 is inserted into the extrusion die head.

[0047] The extrusion die head is configured to extrude melted particles to form a molten state for bottle molding. In order to heat the granular material, the temperature of the die head is relatively high. When the filling needle 9 is inserted into the die head, the high temperature will heat the medicinal liquid in the filling needle 9. It can be understood that the extrusion die head per se does not form a part of the present invention, and the structure and working principle thereof belong to common general knowledge known to those skilled in the art. The present invention mainly focuses on how to optimize the cooling design of the filling needle 9 to improve the reliability of the medicinal liquid inside the filling needle 9 in the environment at the upper extrusion die head.

[0048] In summary, when the filling needle 9 needs heat dissipation, cooling water is introduced into the water inlet pipe 2 by the cooling water tank 10, the cooling water flows through the filling valve plate 1 and also flows through the cooling channel of the filling needle 9, and the cooling water flows back to the cooling water tank 10 again through the water outlet pipe 3. Through the circulating flow of the cooling water, the heat of the filling needle 9 can be quickly taken away, so as to prevent the heat of the extrusion die head from affecting the quality of the medicinal liquid. During the circulating flow of the cooling water, the arranged water pump 11 can accelerate the flow speed of the cooling water and improve the heat dissipation efficiency of the filling needle 9.

[0049] During the process of cooling the medicinal liquid inside the filling needle 9, the filling needle 9 and part of the pipelines connected thereto are sealed through the inlet valve 4 and the outlet valve 5, a first recording of the pressure value of the closed pipeline section is performed by the pressure detection switch 12, then the low-water-solubility gas is input into the closed pipeline section by the pressure charging valve 7. After the pressure detection switch 12 detects that the pressure in the pipeline section tends to be stable, the pressure charging valve 7 is closed, the pressure backflow is blocked by the check valve 6, a second recording of the pressure value in the pipeline is performed by the pressure detection switch 12. By comparing the pressure difference between the first recording and the second recording with a set value, if the pressure difference is less than the set value, it is qualified; if the pressure difference is greater than the set value, it is unqualified. In this way, the integrity of the cooling system of the device can be detected before and after production.

[0050] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0051] The cooling system sealing detection device provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A cooling system sealing detection device, characterized in that, include: Filling needle (9); A filling valve plate (1) is connected to the cooling channel of the filling needle (9); Cooling circulation pipeline, the cooling circulation pipeline is used to deliver cooling medium to the cooling channels of the filling valve plate (1) and the filling needle (9); An inflation detection unit is used to deliver detection gas into the cooling channel of the filling valve plate (1) and the filling needle (9), and to indicate the leakage status of the cooling channel by detecting the change in gas pressure.

2. The cooling system sealing detection device according to claim 1, characterized in that, The cooling circulation pipeline includes a cooling water tank (10), an inlet pipe (2), and an outlet pipe (3). The cooling water tank (10) is connected to the filling valve plate (1) through the inlet pipe (2) and to the filling valve plate (1) through the outlet pipe (3) to form a cooling water circulation loop.

3. The cooling system sealing detection device according to claim 2, characterized in that, The cooling circulation pipeline is also equipped with a water pump (11) to drive the cooling water in the cooling water tank (10) to circulate in the cooling circulation pipeline.

4. The cooling system sealing detection device according to claim 1, characterized in that, The filling needle (9) includes an inner tube and an outer tube, which are arranged in a jacketed manner. The inner tube is the liquid channel and the outer tube is the cooling water channel.

5. A cooling system sealing detection device according to claim 4, characterized in that, The inflation detection unit includes an inflation gas path (8), which is connected to the cooling water channel of the outer tube of the filling needle (9) through an inflation valve (7). The inflation valve (7) is used to control the flow of gas to and from the cooling water channel. The inflation gas path (8) is connected to a gas source, which provides detection gas. The detection gas is a low water-soluble gas.

6. A cooling system sealing detection device according to claim 5, characterized in that, A one-way valve (6) is connected in series on the pressurization air passage (8) between the pressurization valve (7) and the filling valve plate (1).

7. A cooling system sealing detection device according to claim 5, characterized in that, The pressurized gas path (8) supplies the cooling water passage with a low water-soluble gas, which is nitrogen, air or an inert gas.

8. A cooling system sealing detection device according to claim 2, characterized in that, The inlet pipe (2) is connected to an inlet valve (4), and the outlet pipe (3) is connected to an outlet valve (5). The inflation detection unit also includes a pressure detection switch (12), which is installed on the cooling circulation pipeline between the inlet valve (4) and the outlet valve (5).

9. A cooling system sealing detection device according to claim 1, characterized in that, The sealing detection device also includes an extrusion die, and the filling needle (9) is inserted into the extrusion die.

10. A cooling system sealing detection device according to claim 2, characterized in that, The cooling water tank (10) is equipped with a cooling device to cool the cooling water.

Images